Variable optical attenuator with wavelength dependent loss compensation
    5.
    发明授权
    Variable optical attenuator with wavelength dependent loss compensation 有权
    具有波长相关损耗补偿的可变光衰减器

    公开(公告)号:US07295748B2

    公开(公告)日:2007-11-13

    申请号:US11462503

    申请日:2006-08-04

    IPC分类号: G02B6/00

    摘要: The invention relates to compensating for the wavelength dependent loss (WDL) in a variable optical attenuator (VOA) system by using a chromatic dispersion wedge, which is inserted between the mirror and the lens. Different wavelength components, e.g. shorter blue and longer red wavelengths, are redirected at different angles by the chromatic dispersion wedge and now arrive at the output fiber at different positions. Thus the smaller mode field diameter (MFD) or mode spot size of the blue light, overlaps more of the core of the output fiber by being closer thereto and now has less insertion loss (IL) as compared to a VOA without WDL compensator.

    摘要翻译: 本发明涉及通过使用插入镜和透镜之间的色散楔来补偿可变光衰减器(VOA)系统中的波长相关损耗(WDL)。 不同的波长分量,例如 较短的蓝色和较长的红色波长通过色散楔形件以不同的角度重定向,现在在不同位置到达输出光纤。 因此,与没有WDL补偿器的VOA相比,蓝光的较小的模场直径(MFD)或模式光斑尺寸通过更靠近输出光纤的核心而更多地与现在具有较小的插入损耗(IL)。

    Variable Optical Attenuator With Wavelength Dependent Loss Compensation
    6.
    发明申请
    Variable Optical Attenuator With Wavelength Dependent Loss Compensation 有权
    具有波长依赖损耗补偿的可变光衰减器

    公开(公告)号:US20070031104A1

    公开(公告)日:2007-02-08

    申请号:US11462503

    申请日:2006-08-04

    IPC分类号: G02B6/00

    摘要: The invention relates to compensating for the wavelength dependent loss (WDL) in a variable optical attenuator (VOA) system by using a chromatic dispersion wedge, which is inserted between the mirror and the lens. Different wavelength components, e.g. shorter blue and longer red wavelengths, are redirected at different angles by the chromatic dispersion wedge and now arrive at the output fiber at different positions. Thus the smaller mode field diameter (MFD) or mode spot size of the blue light, overlaps more of the core of the output fiber by being closer thereto and now has less insertion loss (IL) as compared to a VOA without WDL compensator.

    摘要翻译: 本发明涉及通过使用插入在镜子和透镜之间的色散楔来补偿可变光衰减器(VOA)系统中的波长相关损耗(WDL)。 不同的波长分量,例如 较短的蓝色和较长的红色波长通过色散楔形件以不同的角度重定向,现在在不同位置到达输出光纤。 因此,与没有WDL补偿器的VOA相比,蓝光的较小的模场直径(MFD)或模式光斑尺寸通过更靠近输出光纤的核心而更多地与现在具有较小的插入损耗(IL)。

    Variable Optical Attenuator
    7.
    发明申请
    Variable Optical Attenuator 有权
    可变光衰减器

    公开(公告)号:US20080205845A1

    公开(公告)日:2008-08-28

    申请号:US12022776

    申请日:2008-01-30

    IPC分类号: G02B6/00

    CPC分类号: G02B6/34 G02B6/266

    摘要: A variable optical attenuator is disclosed, which attenuates a beam of light while preserving its polarization substantially independent of wavelength. The beam of light is attenuated by a filter patterned with a grating of blocking stripes with serrated edges, which partially block and partially transmit the beam of light, respectively. The serrated edges provide for low polarization dependent loss. Along a length of the filter, a mark to space ratio of blocking stripe and aperture widths increases. By a linear translation of the filter along its length attenuation can be varied to a desired value. A stepper motor with lead screw can provide a suitable linear translation to give the filter a latching property.

    摘要翻译: 公开了一种可变光衰减器,其在保持其基本上与波长无关的极化的同时衰减光束。 光束被由具有锯齿状边缘的阻挡条纹光栅图案化的滤光片衰减,其分别部分地阻挡并部分地透射光束。 锯齿边缘提供低偏振相关损耗。 沿滤波器的长度,阻挡条纹和孔径宽度的标记与空间比增加。 通过沿其长度的滤波器的线性平移可以将衰减改变为期望值。 具有导螺杆的步进电机可以提供适当的线性平移以使过滤器具有锁定特性。

    Compact tap monitor with a reflection mask
    8.
    发明授权
    Compact tap monitor with a reflection mask 有权
    紧凑型水龙头监视器,带有反光罩

    公开(公告)号:US08664584B2

    公开(公告)日:2014-03-04

    申请号:US12905478

    申请日:2010-10-15

    CPC分类号: G02B6/4207 G02B6/32

    摘要: A compact PD unidirectivity solution for an optical tap monitor, which reduces the overall size of optical tap module, is provided. The solution is to use lensing to separate the light from the input and output fibers, and then add a mask or spacer in front of the monitor PD to prevent any of the light from the output fiber from entering the photodetector package.

    摘要翻译: 提供了用于光学抽头监视器的紧凑型PD单向解决方案,其减小了光学抽头模块的总体尺寸。 解决方案是使用透镜来分离来自输入和输出光纤的光,然后在显示器PD的前面添加一个掩模或垫片,以防止任何来自输出光纤的光进入光电检测器封装。

    Variable Optical Attenuator
    9.
    发明申请
    Variable Optical Attenuator 审中-公开
    可变光衰减器

    公开(公告)号:US20090103867A1

    公开(公告)日:2009-04-23

    申请号:US12245817

    申请日:2008-10-06

    IPC分类号: G02B6/26

    摘要: A compact variable optical attenuator having optical-tap functionality is described comprising a planar waveguide attenuator, a lens, and a photodetector. Input and output waveguides are located close to the optical axis of the lens, which reduces optical aberrations and insertion loss. The waveguide attenuator works by light absorption with virtually no scattered light present, which improves fidelity of measurements of the tapped optical power by the photodetector. The entire tap-attenuator assembly is packaged into a small form pluggable (SFP) package having two optical connectors.

    摘要翻译: 描述了具有光学抽头功能的紧凑型可变光衰减器,其包括平面波导衰减器,透镜和光电检测器。 输入和输出波导位于靠近透镜的光轴的位置,这减少了光学像差和插入损耗。 波导衰减器通过光吸收工作,实际上没有散射光存在,这提高了由光电检测器测量的抽头光功率的保真度。 整个抽头衰减器组件被封装成具有两个光学连接器的小型可插拔(SFP)封装。

    Variable Optical Attenuator
    10.
    发明授权
    Variable Optical Attenuator 有权
    可变光衰减器

    公开(公告)号:US07477827B2

    公开(公告)日:2009-01-13

    申请号:US12022776

    申请日:2008-01-30

    IPC分类号: G02B6/00

    CPC分类号: G02B6/34 G02B6/266

    摘要: A variable optical attenuator is disclosed, which attenuates a beam of light while preserving its polarization substantially independent of wavelength. The beam of light is attenuated by a filter patterned with a grating of blocking stripes with serrated edges, which partially block and partially transmit the beam of light, respectively. The serrated edges provide for low polarization dependent loss. Along a length of the filter, a mark to space ratio of blocking stripe and aperture widths increases. By a linear translation of the filter along its length attenuation can be varied to a desired value. A stepper motor with lead screw can provide a suitable linear translation to give the filter a latching property.

    摘要翻译: 公开了一种可变光衰减器,其在保持其基本上与波长无关的极化的同时衰减光束。 光束被由具有锯齿状边缘的阻挡条纹光栅图案化的滤光片衰减,其分别部分地阻挡并部分地透射光束。 锯齿边缘提供低偏振相关损耗。 沿滤波器的长度,阻挡条纹和孔径宽度的标记与空间比增加。 通过沿其长度的滤波器的线性平移可以将衰减改变为期望值。 具有导螺杆的步进电机可以提供适当的线性平移以使过滤器具有锁定特性。